This paper describes an experimental approach to formally
testing the usability of different power system
visualizations. In particular, the ability of participants to
assess and correct power system voltage problems was
tested. Participants were divided into three groups: the
first group only saw tabular data, the second group one-
line data, while the third group saw one-line data and a
color voltage contour. The time to acknowledge the
voltage violations and the time to correct the violations
were assessed.
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